Mbappe did play in Monaco's first two games of the new French season - including against PSG
Monaco's 18-year-old forward Kylian Mbappe has been left out of the squad for Friday's league match with Metz.
French newspaper L'Equipe has previously reported that Paris St-Germain are close to signing France international Mbappe, one of the most coveted talents in football.
He has also been linked with Real Madrid and Manchester City this summer.
Mbappe was an unused substitute for Monaco's most recent match, a 4-1 victory over Dijon on Sunday.
In explaining that decision, Monaco boss Leonardo Jardim said on Wednesday: "We never punish our players. That is not the right word. Protected is a better word."
'Mbappe should stay at Monaco'How Monaco became Europe's talent factory
He added: "When so many things are happening around an 18-year-old kid, it is our responsibility to protect him.
"Kylian is not at 100%. He is not in great form. But that is to be expected of a kid who is just 18.
"Even you (journalists), if tomorrow another newspaper offers you a contract where you will earn 15 times more, you won't be so good when it comes to tapping the keys on your computer keyboard."
Mbappe did play in Monaco's first two games of the new French season - including against PSG in the Trophee des Champions.
In July, Monaco accused several "top European clubs" of making illegal approaches for the teenage forward.
BBC Sport understands Manchester City were the only English club accused, although Fifa say they are yet to receive an official complaint.
Source: bbc.com